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Note 4 - Intangibles - Schedule of Patents (Details) - USD ($)
Mar. 31, 2023
Dec. 31, 2022
Finite-Lived Intangible Assets, Net $ 886,317 $ 906,975
Patents [Member]    
Gross Carrying Amount 1,400,000 1,400,000
Accumulated Amortization (521,490) (501,433)
Finite-Lived Intangible Assets, Net $ 878,510 $ 898,567